I saw a TIL post talking about a radio station that transmitted so much power that people nearby could hear it in their furniture. How is that even possible? I though speakers were made to that audio could be correctly relayed yet a spring mattress can play audio?
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At its most basic, a receiver circuit, consists of only three elements: an antenna, which picks up an electromagnetic radio signal; a detector, which is an electrical component that converts the radio wave to an audio signal the human ear can pick up; and a transducer, which is anything that acts like a speaker.
In extremely rare case, things not a are not actual receivers can accidentally act like a receiver. If you have something electrically conductive to act as an antenna, something to act as a semiconductor to detect the audio signal, and something to vibrate enough to produce noise, you’ve got a very primitive accidental receiver that can turn radio waves into sound.
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